Hi
So you need to be running a View 5.2 Environment ie 5.2 Connection Server. If this is greenfield, then suggest you go for the latest 5.3 version, and this needs the 5.3 Connection Server. These will then detect the 5.2 (or 5.3 agents). Onto the agents you install the feature pack. You won't be able to install a 5.2 broker in a 4.6 environment as the 4.6 connection server doesn't "understand" the 5.2 agents. For RTAV support - For a 5.2 environment you need to install the Feature Pack 2 and for a 5.3 environment you'd need the FP1.
Note; if this is a greenfield site - is it possible to use Lync2013? If so then View has integration with Lync 2013 which will mean that you can benefit from all the goodness of Lync (ie audio and video goes direct to the recipient rather than needing to go via the VM in the datacentre) This reduces the hair pinning effect.
and
http://www.vmware.com/files/pdf/techpaper/vmware-horizon-view-microsoft-lync-install-configure.pdf
cheers
peterB